VIM (Vacuum Induction Melting) is a metallurgical melting process that melts metals and alloys by electromagnetic induction under high‑vacuum environment.

It heats the charge inside a water‑cooled copper crucible via induction coils in vacuum, effectively removing gases such as hydrogen, oxygen and nitrogen, reducing impurity content. Widely used for producing high‑quality special alloys, superalloys, titanium‑based alloys and high‑grade steel ingots.

ESR (Electro‑Slag Remelting) is an advanced secondary metallurgy refining process. A consumable electrode made of pre‑melted alloy is remelted by the heat generated from electric current passing through high‑temperature molten slag. Liquid metal droplets pass through the slag bath to realize desulfurization and inclusion removal, then solidify directionally in the water‑cooled mould to obtain dense, homogeneous high‑quality ingots. ESR furnace is widely applied for superalloys, tool steels, high‑strength steels and special‑purpose alloys.

VAR (Vacuum Arc Remelting) is a secondary vacuum remelting metallurgical process. A consumable electrode is melted by high‑temperature electric arc under high‑vacuum condition. Molten metal droplets fall into a water‑cooled copper crucible, where they solidify directionally to form a refined ingot. The vacuum environment promotes degassing of hydrogen, oxygen and nitrogen, reduces volatile impurities and improves ingot compactness and microstructure uniformity. VAR furnace is mainly used for superalloys, titanium alloys and high‑reactive special metals, commonly combined with VIM to form the classic VIM‑VAR production route.

LS Heavy‑Industry High‑Speed Forging Hydraulic Press Unit is a domestic self‑developed large‑scale free‑forging hydraulic equipment manufactured by Lanzhou LS Heavy‑Machinery Co., Ltd. It consists of hydraulic press mainframe, forging manipulators, material handling robots and auxiliary systemsLS Group. Adopting pre‑stressed combined frame structure, either pull‑down or push‑down double‑column layout, the unit features high forging stroke frequency, fast response hydraulic system and precise position control. Supported by PLC‑based multi‑level intelligent control system, it can realize manual, semi‑automatic and fully‑automatic linked forging operations, completing upsetting, drawing out, punching, stretching on mandrel and other free‑forging processes兰州兰石重.... It is widely used for hot working of superalloys, titanium alloys, tool steels, stainless steels and high‑strength alloy steels. Frequently matched with VIM‑ESR / VIM‑VAR remelted ingots, it performs cogging and open‑die forging for aerospace, energy and advanced‑material industries.

Under high‑vacuum or inert protective‑gas atmosphere, it performs stress‑relief annealing, recrystallization annealing and solution treatment for stainless‑steel, superalloy and precision‑forged workpieces. The 316L liner delivers excellent corrosion‑resistance, reduces iron‑contamination and avoids oxidation of workpieces during heating and cooling cycles. Equipped with high‑performance vacuum pumping set and multi‑segment programmable temperature control system, it ensures uniform temperature distribution inside the chamber. It is commonly used for post‑forging heat treatment of remelted ingots from VIM‑ESR / VIM‑VAR processes to homogenize microstructure and eliminate residual forging stresses.

Lathe is a fundamental metal‑cutting machine tool. The workpiece rotates around the main spindle, while stationary cutting tools perform turning operations to remove excess material. It is mainly used for machining cylindrical, conical, circular‑arc and threaded surfaces of rotary parts. Typical processes include turning outer diameter, inner bore, end face, grooving, threading and parting off.

Band‑saw machine is a metal cutting machine tool widely used in steel plants and special‑metallurgy workshops. It uses an endless circulating band‑saw blade as cutting tool. The continuous rotating saw band feeds into workpieces to realize high‑efficiency sawing and cutting of metal billets, ingots, forged blanks and electrode stocks.